2022 年 39 巻 3 号 p. 209-214
Examination of the dizziy patient should include a search for neurological signs and symptpms and a careful observation of nystagmus. Most of neurological signs and symptoms detected are the marker of dizziness of central origin. However, some of them represent the vestibular or other neurological imbalance that causes dizziness. Nystagmus also represents the central or peripheral vestibular imbalance that causes dizziness. Careful examinaiton can also help differentiation of psychogenic (functional) dizziness.
Persistent postural–perceptual dizziness (PPPD) is a newly defined diagnostic syndrome characterized by chronic subjective dizziness that exacerbated by three factors : upright posture, active or passive motion, and exposure to moving visual stimuli or complex visual patterns. The main mechanism of PPPD is thought to be a long–term maladaptation to a neuro–otologic event.
